Is there a minimum or limit to the number of guests?
A Kai & Kōrero is limited to 6-10 guests so that there are different perspectives to make the conversation interesting, but not too many so that everyone has a chance to feel heard.
However, if you can only fit 4 or 5 at your dining table at home, that is great too.
Or if you want to have a large event with 20+ guests, that is alright as well. Just make sure you have one designated host to follow the conversation guide for every 10 people, and make sure you have tables far enough away from one another so that everyone can listen.